Zhone 7995 Guida Utente
4. Configuring the Unit Using the Internal Switches
7990-A2-GB20-00
May 2002
4-7
.
Table 4-4.
Switchpack S4 Definitions – Model 7996
Switch # . . .
Allows you to . . .
Default in Bold
1
Enable or disable Switchpacks S3 and S4.
OFF = Switchpacks Disabled
ON = Switchpacks Enabled
ON = Switchpacks Enabled
2
Control line termination.
OFF = 120 Ohm
ON = 75 Ohm
ON = 75 Ohm
3
Select the unit’s primary timing source. Valid only for a unit configured as
the STU-C.
the STU-C.
OFF = Internal Clock
ON = External Clock
ON = External Clock
4
Control the unit’s E1 line coding.
OFF = HDB3
ON = AMI
ON = AMI
5
Determine whether the unit will use G.704 framing.
OFF = Framed
ON = Unframed
ON = Unframed
6
Enable CRC-4 generation and monitoring. Valid only for a unit configured
for Framed mode (Switch 5).
for Framed mode (Switch 5).
OFF = Disable CRC-4 generation and monitoring
ON = Enable CRC-4 generation and monitoring
ON = Enable CRC-4 generation and monitoring
7
Control whether Channel 16 contains signaling information or data. Valid
only for a unit configured for Framed mode (Switch 5).
only for a unit configured for Framed mode (Switch 5).
OFF = Channel 16 is used for signaling (voice mode)
ON = Channel 16 is used for data (data mode)
ON = Channel 16 is used for data (data mode)
8
Not used